NXP Semiconductors MC9S08SH16CTG

Overview

MC9S08SH16CTG from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB flash, 1 KB RAM, and integrated ADC, SPI, I²C, SCI, TPM, RTC, and ACMP peripherals. It operates at up to 20 MHz bus frequency, supports stop3 low-power mode, and targets embedded control in industrial sensors and automotive body electronics.

For engineers reviewing the MC9S08SH16CTG datasheet, MC9S08SH16CTG pinout, MC9S08SH16CTG application, or MC9S08SH16CTG equivalent, key selection criteria include flash size, stop3-mode operation, on-chip debug support, and peripheral mix for cost-sensitive 8-bit control applications.

Technical Context

The MC9S08SH16CTG implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources. Its internal clock source (ICS) delivers 2–20 MHz bus frequencies using FLL with precision-trimmed internal reference (±0.2% resolution, ±2% deviation over voltage/temperature).

Peripherals include a 10-bit 16-channel ADC with 2.5 μs conversion time and temperature sensor, dual TPM modules with PWM/capture capability, and real-time counter with 1 kHz low-power oscillator enabling wake-up from all modes - including stop3 - without external components.

Key Specifications

Pinout & Package

MC9S08SH16CTG is packaged in 16-pin TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, 5.0 mm × 4.4 mm body, and exposed pad for thermal performance. Pinout validated per Freescale MC9S08SH32 Series Data Sheet Rev. 3 (covers MC9S08SH16).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC9S08SH16CTG, MC9S08SH32CTG offers direct scalability within the same footprint and software ecosystem, while S9KEAZ128AMLH provides architectural modernization at the cost of redesign effort and toolchain migration.

Availability

MC9S08SH16CTG is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body electronics, smart appliance subsystems, and medical handheld diagnostics requiring stable component supply and long-term manufacturability.

Supply support for MC9S08SH16CTG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08SH16CTG belongs to the HCS08 family - designed specifically for cost-sensitive, low-power embedded control applications demanding high integration, robust debug support, and long product lifecycles.

FAQ

What is the maximum bus frequency supported by the MC9S08SH16CTG?

The MC9S08SH16CTG supports a maximum bus frequency of 20 MHz, achieved via its internal clock source (ICS) with frequency-locked loop (FLL). This frequency is maintained across full operating voltage and temperature ranges when using the precision-trimmed internal reference, enabling deterministic real-time performance without external crystal dependency in many applications. The MC9S08SH16CTG's FLL allows stable operation from 2 MHz to 20 MHz.

Does the MC9S08SH16CTG support low-power operation with real-time wake-up capability?

Yes, the MC9S08SH16CTG supports multiple low-power modes including Stop3 - its deepest sleep state - where only the real-time counter (RTC) and analog comparators remain active. The on-chip 1-kHz low-power oscillator enables cyclic wake-up without external components, allowing the MC9S08SH16CTG to maintain time-of-day or schedule periodic sensor reads while consuming microamp-level current. RTC operation is confirmed in all MCU modes including stop3.

What debug interface does the MC9S08SH16CTG provide, and is it production-programmable?

The MC9S08SH16CTG features a single-wire background debug mode (BDM) interface compliant with Freescale/NXP standards. It supports in-circuit debugging, flash programming, and breakpoint setting - including one active breakpoint and two additional breakpoints in the on-chip debug module. The MC9S08SH16CTG can be programmed in-system via BDM without requiring socketing or special programming hardware, making it suitable for both development and field firmware updates.

How much flash memory and RAM does the MC9S08SH16CTG include, and is it protected against unauthorized access?

The MC9S08SH16CTG integrates 16 KB of on-chip FLASH memory and 1 KB of RAM. Both memory blocks are protected by dedicated security circuitry that prevents unauthorized read-out of contents - critical for safeguarding firmware intellectual property and calibration data. Flash block protection and security lock bits are configurable via dedicated registers (FPROT, NVPROT, FOPT), and once enabled, prevent external access even during debug sessions. This protection applies directly to the MC9S08SH16CTG.

Which analog peripherals are integrated into the MC9S08SH16CTG, and what are their key capabilities?

The MC9S08SH16CTG integrates a 10-bit, 16-channel ADC with 2.5 μs conversion time, internal bandgap reference, and integrated temperature sensor - all operational in stop3 mode. It also includes two analog comparators (ACMP) with selectable interrupt edges and routing to TPM for event-triggered actions. These analog functions eliminate the need for external signal-conditioning ICs in basic sensing applications, and their stop3 compatibility ensures continuous monitoring during ultra-low-power operation - a verified capability of the MC9S08SH16CTG.